Google snaps up security firm Impermium

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While security startup Impermium doesn't have the hot name cache of Nest, it is Google's latest corporate buy.

Impermium specialized in helping Web sites fight spam, something that Google is already an industry leader at doing, but it had chops at stopping fraud and abuse as well.

The company is shutting down its services immediately to begin integration with Google. CEO and co-founder Mark Risher said in a post on the company Web site that he was "excited" to merge Impermium with "some of the best abuse fighters in the world." Impermium had raised $9 million from firms including Highland Capital Partners, AOL Ventures, Charles River Ventures, and Greylock. Google would not comment on what it paid for Impermium.